Lighting fixture



Nov. 10, 1959 F. c. WINKLER LIGHTING FIXTURE 4 Sheets-Sheet 1 Filed June5, 1955 INVENTOR Frederic C. Winkler.

ATTORNEY WITNESSES F. C. WINKLER LIGHTING FIXTURE Nov. 10, 1959 4Sheets-Sheet 2 Filed 'Junes, 1955 Nov. 10, 1959 F. c. WINKLER LIGHTINGFIXTURE 4 Sheets-Sheet 3 Filed June 3, 1955 4 Sheets-Sheet 4 Filed June3, 1955 Fig. 6.

United States Patent inghouse Electric Corporation, East Pittsburgh,Pa., :1

corporation of Pennsylvania Application June 3, 1955, Serial No. 513,039

7 Claims. (Cl. 240- -;147)

My invention relates to lighting fixtures and, more particularly, to anew and novel means for supporting and securing a door or louveredassemblyto the housing of I the lighting fixture.

As is well known in many lighting applications, it is desirable that thelight source be supported in a fixture which may be located in a recessin the ceiling so that the lower edge of the lighting fixture issubstantially flush with the ceiling. In many installations, it .is alsodesirable that some means, such as a lonvered assembly, or a lightrefracting or a light diffusing panel, be located below the light sourceso as to control the light distribution from the fixture. In fluorescentlighting installations, elongated housings are used to so supportelongated fluorescent lamps, which has necessitated that elongatedcontrol panels be utilized. Such control panels are usually supported inelongated door assemblies which are re- .movably secured to the bodymember of the trofifer.

out tools of any kind and should be located on the fiX- ture so asnot'to provide any parts extending below the lower surface of thetrotfer which may be likely to cause injury or interfere with theoutsidemaintenance of the fixture. With such a troifer it is alsodesirable that some means be provided for safely retaining the doorassembly in the open position at theelevated heights in such a mannerthat there is .substantially no likelihood that the door assembly couldbe accidentally detached and fall to the floor, and also so that it willnot interfere with any maintenance operations.

Accordingly, one object of my invention is to provide a new and improvedmeans for securing a door assembly to the housing of a lighting fixturewhich has releasing means located so as,to be substantially flush withthe lower surface of the fixture.

Another object of my invention is to provide a new and improved meansfor securing a door assembly to the housing of a lighting fixture whichis completely concealed except for a small releasing portion locatedadjacent the lower surface of the fixture.

Another object of my invention is to provide a new and improved meansfor securing a control panelto the housing of a lighting fixture havingone part on thehousing which automatically engages another part on thecontrol panel when the door assembly is placedin its operating position.1

Another object of my inventionis to provide a new and improved means forsecuring a doorassembly to the housing of a lighting fixture whichincorporates a spring loaded latch.

housing.

ice

Another object of my invention is to provide a new and improved meansfor securing a..door assembly to a lighting fixture which comprises apivotallysupportejd latch located externally of the housing for thefixture and which latch hasone arm extending into the housing so as tobe accessible from the underside of the lighting fixture.

Another object of my invention is .to provide anew and improved meansfor pivotally supporting a door assembly from the side of the housing ofa lighting fixture. Another object of my invention is .to provide a newand improved means for pivotally supporting a doorhassembly from oneside of the housing of a lighting fixture comprising a concealedreversibly bent hingeplate.

Another object of my invention is to provide anew and improved .meansfor pivotally securing a ,door assembly from one side,of the housing ofa lighting fixture which is pivotally movable on an uppersurface of.th;e

A more specific object of my invention is toflprovide a new andimpro-ved means for pivotally supporting ia door assembly along onesideof alighting fixtureconiprising an upwardly extending U-shapedmember having one end of one armsecured to the control vpanel andtlieother end of the other arm provided with outwardly extending tabs ateach side which extend through elongated opening in the side of thehousing.

Another object of my invention is to provide a new and improved meansfor pivotallysupporting .a .door assembly along one side of a lightingfixture whichcannot be removed from the fixture unless opened and movedupwardly with respect to the lighting fixture.

These andother objects of my invention ,Will become more apparent uponconsideration of thefollowingdtailed description of a lightingfixtureconstr'ucted: in .accordance with the principles of my inventionwhen taken in conjunction with the attached drawings,-in which:

Figure 1 is a perspective view of an elongated fluorescent lamp fixtureillustrating a door assembly ,supported along one side of the fixturehousing inthe open position, by.means of hinges constructed inaccordance with the principles .of'my invention; Y i

Fig. 2 1s a partial cross section view 'of .oneside of the fixture shownin Fig. 1 illustrating an end elevationalview of a latchconstructed inaccordance withv the. principles of my invention for releasably securinga door assembly to the underside of the lighting fixture;

Fig. 3 is a partial side elevation and partial.cross,sec tional view ofthe latch as, shown in Fig. 2 taken along the lineIII-e-lII thereof, andshowingthe operating arm thereof in elevation; 3

Fig. 4- is a perspective, exploded .view of asegment of the housingshown in Fig. 1 through vWhichahinge fix tends, .and the portion of thedoor assemblycooperable therewith; I

:Fig. 5 is a perspective viewof the .latch mechanism shown in Figs. 2and 3 and a portion of the housing and door assembly; and I Q Fig. 6 isa cross sectional view of the segment of the housing and door assemblyshown in Fig 4, with .the hinge and door assembly in the closedposition.

When alighting fixture is recessed into the ceiling so that theloweredge of the fixture issubstantially fiush with the ceiling, thelighting fixtures are more specifically designated as troffers andareprovided .with a housing which conforms to certain industryspecifications so that such .a housing may be supported in the varioustypes of commercial ceilings in various well .known manners. Referringto Fig. 1, it will be noted that such a trofier comprises an elongated,inverted, generally U-shap ed housing ,2 which-.rnay be, made fromany-suitableniaterial which has sufiicient structural strength, andwhich may readily be formed as hereinafter described, such as sheetsteel. As shown, housing 2 comprises an elongated, longitudinallyextending upper bight portion 4 which has a downwardly extending sidewall at each of its sides, each of which extends the entire length ofhousing 2. Each side wall of housing 2 comprises an initial downwardlyextending portion 6 which is approximately perpendicular to the bightportion 4- and which portions are substantially the same length so as toform an upper chamber in which various electrical components forelectrically connecting and controlling the lamps in the troffer may belocated.

A U-shaped bracket 8 is spaced downwardly from the bight portion 4 ateach end of housing 2 which is of a size and which is formed from asuitable material, such as sheet steel, so that its upwardly extendingarms may be secured to the downwardly extending portions 6 in anysuitable manner, such as by being spot welded or fastened thereto.Brackets 8 are for the purpose of supporting lamp holders 10 thereonwhich may be secured to brackets 8 in any well known manner. Inasmuch aslamp holders 10 are located on brackets 8, brackets 8 are spacedaccording to the proper length of the lamp utilized in the fixture.Accordingly, it will be appreciated that in some cases where housing 2has a sufficient length to support a plurality of lamps in tandem,additional brackets 8 must be provided intermediate the ends of housing2. Thus, as shown, intermediate lamp holders 10 are supported in housing2 by intermediate brackets (not shown) so that a standard fluorescentlamp 12 may be supported between spaced opposed pairs of lamp holders10. Inasmuch as the spacing and number of lamps 12 and lamp holders 1t]utilized in such a troffer may be varied and such components do not forma part of my invention, it is not believed that further descriptionthereof is required. These particular components illustrated here aremore particularly shown, described and claimed in the copendingapplication Serial No. 348,666, filed April 14, 1953, now Patent No.2,852,663, entitled Luminaires by Nick Stuffer and Leonard H. Seeley,which has been assigned to the same assignee as the assignee of thisapplication. It will also be noted that brackets 8 are utilized tosupport an elongated reflector plate 14 therebetween above the lamps 12in any suitable manner, which structure is also shown, described andclaimed in the above-identified application. It will also be realizedthat various types and lengths of lamp 12, other than the particularrepresentation of fluorescent lamps 12 illustrated, may be utilized insuch a troffer.

Each side wall of housing 2 is also provided with an elongateddownwardly and outwardly extending lower side wall portion 16 whichextends from the lower edge of portion 6 so as to provide an enlargedopening for the housing below lamps 12. Each side wall 16 of housing 2is, in turn, provided with a particular structure at its lower edgewhich is of standard size and shape so that housing 2 may be located ina definite well-known manner in various ceiling structures. Inasmuch assuch lower structure of housing 2 is substantially fixed, it can beappreciated that any hinge and latch mechanism for use with housing 2must be such that it can be used with such required lower structure ofhousing 2. As shown in Figs. 2, 3 and 6, the lower edge of each sidewall portion 16 is provided with an upwardly and outwardly extendingconnecting portion 18 so as to form an upwardly open V-shaped head atthe lower edge of each side wall portion 16. Each side wall of housing 2is also formed so as to provide a narrow upper flange portion 20 whichextends laterally outward from the upper edge of connecting portion 18.Each side wall of housing 2 is also provided with a lower flange portion22 which extends outwardly beyond the outer edge of upper flange portion20 and which is spaced downwardly therefrom. As

"shown, the outer edge of flange portion 20 is substantially in verticalalignment with the inner edge of flange portion 22 so that flangeportions 20 and 22 may be joined together by an integral verticallyextending side portion 24.

As shown in Figs. 1 and 3, and as more fully shown and described andclaimed in the above-identified application, an assembled door 26 islocated so as to extend, when closed, between the opposed surfaces ofside portions 24. For the purpose of describing my invention, it willsuliice to note that each door 26 may comprise a rectangular framehaving formed side members and end members for supporting the lightcontrol means such as a glass plate 28 therebetween. Although a glassplate 28 is shown, it is to be realized that other light control meanssuch as a louver assembly may be similarly employed. It will be notedthat a side member of door 26 is located adjacent each side portion 24of housing 2 and comprises an elongated portion which is L-shaped insection having an outer upwardly extending leg 30 closely adjacent to,but spaced inwardly of, the side portion 24 of housing 2 adjacentthereto. Each leg 36 extends the length of housing 2 and has its upperfree edge, when the door 26 is closed, spaced upwardly from the loweredge of the V shaped bead formed by side wall portion 16 and connectingportion 18, so as to cooperate therewith to form a light trap. The otherleg 32 of each of the L-shaped portions of each of the side members ofdoor 26 extends inwardly below housing side wall portions 16 and isformed at its inner end to provide a U-shaped support 34 for the plate28. Each support 34 is formed so that each of its arms is approximatelyparallel to leg 32 of the side member of panel 26 and so that theirinner ends are substantially flush with the inner end of leg 32.

Referring to Figs. 1, 4 and 6, it will be noted that one side portion 24of the housing is provided with a pair of longitudinally spacedrectangular openings 36 each of which is elongated longitudinally ofhousing 2 and has its sides spaced laterally inwardly of the upper andlower edges of side portion 24. Each end of each opening 36 is centrallyprovided with a longitudinally outwardly extending notch 38. Openings 36are provided so that hinges 40, which are secured to and extendoutwardly from a side member of the door 26 can pivotally support thedoor 26 from housing 2.

Hinges 40 are irregularly shaped and comprise a generally elongatedinverted U-shaped portion 39, one arm of which is provided at each ofits sides at its outer end with laterally outwardly extending tabs 42,and the other arm is provided at its outer end with a laterallyoutwardly extending flange portion 44. As shown in Figs. 6, the flange44 of hinge 40 engages the upper surface of the side member of door 26between leg 30 and the inward ly located U-shaped portion 34 and issecured thereto in any suitable manner, such as by being spot weldedthereto. When hinges 40 are so secured to the door, the U- shapedportion 39 extends around the upwardly extending leg 30 of the sidemember of door 26 so that the arm having the tabs 42 thereon extendsoutwardly of, and is approximately parallel to the side member of door26. By such a construction, the door 26 may readily be pivotally securedto the side member 24 of housing 2 by merely inserting the opposed tabs42 on each hinge 4-6 into the opposed notches 38 at each end of itscooperable opening 36 inside member 24 until the tabs 42 are locatedoutwardly of the side member 24 of housing 2. It will be noted howeverthat the arms of hinge 40 are spaced apart a distance which is less thanthe distance between the lower edge of side member 24 and the lower edgeof the notches 38 in side member 24. In view of such limited spacing ofthe arms of hinge 40, it will be obvious that the tabs 42 cannot beinserted through notches 38 when the arms of the hinge 40 areapproximately perpendicular to the inner side of side member 24. Suchinsertion can be accomplished by raising the door 26 so that the arms ofhinge 40 are disposed at a different angle with relation to'side member24' and are located belowflange 2t) of housing 2. In actual practice,such insertion can readily be accomplished by holding the door so thatthe arms of hinge 40 extend upwardly and away from side member 24 atapproximately an angle of 45 degrees, which corresponds to a position ofthe door at about 45-degrees to the vertical. Such angle is notcritical, however, anda range of angles may be employed at which thetabs 42 may quickly and easily be inserted into notches 38. However, theangle that the arms of hinge 40 and door can be held, where tabs 42 canbe inserted through notches 38, also has an upper limitdue to theengagement of the bight portion of hinge 40 with the V-shaped portion ofthe side wall of the housing 2. Once such insertion of tabs 42 has beenaccomplished, the door 26 may be lowered so that the tabs 42 are locatedbehind the portion of side portion 24'below each of the notches 38at-each end of opening 36. When tabs'42 are so located, the outer arm ofhinge 40 willbe located within the lower portion of opening 36 and willthus support door 26 when the door 26-is in the open position. In orderto remove the door 26, the

reverse procedure is obviously followed. Thus, it will be noted thatwith such a hinge construction the door 26 may easily be left in theopen or vertical position with no possibility that it can be removedfrom the housng 2 by accidental bumping during servicing of the trotfer,as the tabs 42 will engage the outer surface of side member 24, and leg.30 of the side member of door 26 will engage flange 22 of housing 2 uponupward movement of door 26 to prevent tabs 42 from being alignedwithnotches 38.

It will also be noted that when door 26 is in the vertical or openposition that the undersurface of the outer arm of hinge 46 will engagethe lower edge of opening 36, or

that the lower edge of opening 36 functions as an initial pivot pointaround which the door 26 may initially be rotated or swung. When door 26is swung from the open to the closed position shown in Fig. l, the outeredge of the outer arm of hinge 40 will swing about the initial pivotpoint until it engages the upper surface of the lower flange portion 22of housing 2 so as to provide a second pivot point for the hinge 40 onthe housing 2' which is a major structural member. When door 26 reachesits closed position, the bight portion of U-shaped portion 39 will thenbe located in the upper portion of opening 36 so that'its arms areapproximately parallel to side portion 24; In order that the hinge 40may function as so described, it is obvious that the longitudinal lengthbetween opposed ends of tabs 42 must be slightly less than thelongitudinal distance between the bottoms of opposed notches 33 in sidemember 24 in order that tabs 42 may be inserted therein. Further, inorder to insure that the tabs 42 engage the outer surface of side member24 and that the U-shaped portion 39 may be swung through opening 36, thelongitudinal length of the bight portion and the outer arm of theU-shaped portion 39 is just slightly less than the longitudinal lengthof opening 36. It is equally obvious that the hinges must be spacedonthe adjacent side member of door 26 to correspond with the spacing ofthe openings 36 in side member 24. It should be noted that thisparticular type of hinge construction wherein the pivot point thereofshifts during pivotal movement of the door 26 not only permits the doorto be moved to an open position where it depends vertically from thehinge, but in closing the door it will be moved up into the housing 2 toa position at least flush with the lower housing flanges 22, and evensomewhat thereabove.

Referring to Figs. 2, 3 and 5, a latch mechanism, constructed inaccordance with the principles of my invention, includes a holder 50having a pair of elongated laterally spaced irregularly shaped sidemembers 52 which are joined together at their lower ends by means of anintegral laterally extending flat plate portion 54. Flat plate portion54 of holder 50 also extends longitudinally outwardly beyond the sides52 of holder 50 so that the holder 50 may be secured to the uppersurface of the upper flange portion20 of housing 2 many suitable manner,suchas by being spot welded thereto. Asis obvious, holder 50 is securedto the flange portion 20 which is at the opposite side of the housing 2from. hinges 40. An intermediate opening is provided in plate portion54, between the side portions 52 which is in alignment with asimilarlysized longitudinally'elongated opening 56 in flange portion 20 ofhousing-2, when the holder 50 is secured to the upper side of flange 20.As shown in Fig. 1, foran elongated door 26, a pair of longitudinallyspaced holders 50 are secured to the'same flange portion 20 and,accordingly, a pair of spaced openings 56 (Fig. 3) are provided in thisflange portion 20 of housing 2. However, for the purpose of myinvention, the manner in which holders 56 are secured to flange portion20 is unimportant as long as openings 56 in flange portion 20 of housing2 are in alignment with the opening between the side portions 52in theflat plate portion 54 of holder 50.

Holder 50 is for the purpose of pivotally supporting a latch 66, andeach side portion 52 of holder 56 is providedwith an opening 51, whichopenings 51 are in alignment so that any suitable means for providing apivot axis may extend therethrough. As'shown, a steel cotter pin 71extends through such aligned openings 51, although obviously othersimilar means could be provided. 7

Latch 60 (Figs. 3 and 5) comprises a generally inverted U-shaped upperportion 61 having laterally spaced arms 62 and 64 extending downwardlybetween the side portions 52 of holder 50. Each arm 62 and 64 isprovided with an opening which may be aligned with openings 51 in sideportions 52, so that the cottor pin 71 may extend therethrough topivotally support arms 62 and 64 on the support 59. It will be notedthat only a portion of arms 62 and 64 are in alignment with each other.As shown, the outer arm 62 is provided with an upper portion whichextends downwardly from the upper bight portion 61 to the lower edge ofopening 56 in flange 20, and, thereafter, arm 62 is provided with alower portion which extends angularly toward the adjacent end of thehousing.

The/outer arm 62 is located inwardly of adjacent side portion 24 and theinner surface of the outer side portion:v

52'of holder 50, and is provided at its lower edge with an integral tab58 which extends outward below the lower flange portion 22 of thehousing. By such construction, tab Sit-may be engaged by hand and movedabout the pivot axis formed by cotter pin 71 so as to cause its arms 62and 64 to pivotally rotate about the cotter pin 71. If desired, tab 58may be provided with a downwardly offset portion 72 to facilitate itsbeing engaged manually.

Arm 64 ofv latch 66 is provided with an upper portion which extendsdownwardly from the bight portion 61 so as to be approximately parallelto the upper portion of arm 62 of latch 60. Such upper portion of arm 64extends downwardly slightly below the cotter pin 71 and thereafter isprovided with a lower portion which extends angularly outward from itsupper portion in the direction opposite to that in which the lowerportion of arm 62 extends from its upper portion. Such lower portion ofarm 64 is provided at its lower end with an integral hook portion 86which extends outward therefrom in the same direction as the lowerportion of arm 62 extends from its upper portion. Hook portion isrounded at its outer end so as to be cooperable with an elongated formedplate 32 which is secured to the door 26 so that the door 26 may bereleasably'secured to the housing 2 in its closed position. I

As shown, plate 82 is p'rovidedwith a flat elongated portion which is inengagement-with the upper surface of leg 32 of the side member of door26 adjacent the latches and is secured thereto in any suitable mannersuch as by being spot welded thereto. One end'of plate 82 is providedwith an upwardly extending arcuately shaped segment 84 which has acurvature so as to extend over the upper rounded end of hook portion'80of arm 64. Plate 82 is of a width so as to be closely received betweenthe leg 30 and support 34 of the side member of door 26, and has itsuppermost point approximately in alignment with the upper edge ofsupport 34 so as not to interfere with the operation of the door 26. Asshown in solid outline form in Fig. 3, segment 84 of plate 82 is securedto the side member of door 26 so that when door 26 is in the closedposition the hook portion 80 of arm 64 extends below segment 84 with thelower surface of segment 84 engaging the upper edge of hook portion 80.With such a structure, door 26 may easily be opened by merely manuallypushing door 26 upwardly so that segment 84 disengages the hook portion89 and thereafter pushing tab 58 of arm 62 so that latch 69 pivots aboutthe cotter pin 71 to the dotted line position shown in Fig. 3, where thehook portion 80 of arm 64 has been rotated from beneath the segment 84.While so holding tab 58, door 26 may then be lowered about its hinges 49as hook portion 80 is no longer located so as to be engageable withsegment 84.

In order to provide a spring bias for the latch 60 a formed spring 74,which may be made of any suitable spring material which may be formed asdescribed, such as spring steel wire, is provided, which comprises asingle center coil through which the cotter pin 71 extends and a pair ofoutwardly extending arms 76 and 7 8. Arm 76 extends angularly fromcotter pin 71 and is provided with a hook portion at its outer end whichengages the end of the .upper bight portion 61 of latch 66 located onthe same .side of the center of opening 56 as the pivot axis. Arm

78 extends angularly downwardly from cotter pin 71 and has its free endin engagement with the plate portion 54 of holder 50 located on the sameside of the center of opening 56 as the pivot axis. By such constructionmovement of arm 62 of latch 60 in a counterclockwise direction (Fig. 3)about the pivot axis formed by the cotter pin 71 causes the arms 76 and78 of spring 74- to be bent toward each other to stress the center coilso that upon release of tab 58, arm 76 of the spring 74 forces latch 60in a clockwise direction and holds it at the latched position. When door26 is open, spring 74 forces the arm 62 of latch 60 into engagement withthe end of opening 56 adjacent thereto or forces the tab 58 intoengagement with the lower surface of flange 22, or both.

In closing door 26 it is only necessary that the door 26 be forced aboutits hinges 40 upwardly towards the latch 60 so that the upper curvedsurface of segment 84 of plate 82 engages the lower rounded surface ofhook portion 80 of arm 64 to rotate latch 60 in a counterclockwisedirection about its pivot axis. Such counterclockwise rotation of hookportion 80 permits the segment 84 to slip past hook portion 80 and beagain located above the upper surface of hook portion 8%) whereat thespring 74 will force the latch 66 to move in a clockwise direction sothat hook portion 80 again engages the undersurface of segment 84 aspreviously described. With such construction it will be noted that thespring 74 forces the hook portion 81 into engagement with the segment 84at all times when the door 26 is in the closed position so as to providea spring loaded latch for retaining door 26 in the closed position. Ashas also been indicated it is necessary to raise door 26 in order tolower the door 26 so that accidental engagement of tab 58 will notresult in the door 26 being released.

Although the action of only one latch mechanism has been described it isobvious that the operation of a door having longitudinally spacedidentical latches as shown in 'Fig. 1 can easily be operated in the samemanner. Thus Although the material from which the frame for the door 26,the holder 50, latch 60, plate 82 and hinge 40 may be selected from awide variety of materials, it is to be realized that for the economy inmanufacturing a material, which may readily be formed to provide theabove-described structure which has suflicient structural strength suchas sheet steel, is preferred for such components. Thus, it will be notedthat by my invention I have provided both a hinge and a latchingmechanism which are substantially completely hidden except for the minoroutwardly extending tab or tabs 58 which is biased to a position closeto the lower surface of the lower flange portion 22 of the adjacent sidemember of door 26 so as not to materially interfere with the overallappearance of the fixture. Such construction also provides a hinge and alatch which cannot be accidentally released under ordinary servicingconditions, nor do such operations require the use of any tools. A stillfurther advantage of my invention is the fact that the door 26 may beslammed inwardly of the housing to provide the necessary actuation forthe latch 60 to hold the door 26 in the closed position.

Having described a preferred embodiment of my invention it is desiredthat the invention be not limited to the particular form specificallyillustrated and described herein as it will be readily apparent topersons skilled in the art that various changes and modifications may bemade in the particular structures shown without departing from the broadspirit and scope of my invention. Accordingly, it is desired that myinvention be given a broad scope and that it be limited only as requiredby the prior art.

I claim as my invention:

1. A lighting fixture comprising, a housing having a bottom opening, atleast one side wall of the housing having at the lower edge thereof aflange which extends laterally outwardly thereof, an opening in said oneside wall having its lower edge spaced above and parallel to saidflange, a door having a closed position where it is located within saidbottom housing opening, said door having at its side adjacent said onehousing side wall a hinge member in the form of an elongated arm whichextends laterally outwardly from the door through said one side wallopening from the inner side of said one side wall at a location abovethe lower edge of said wall open ing, with its outer end being bentdownwardly into engagement with the upper surface of said flangeportion, said outer end of said arm being of a length greater than thedistance from the lower edge of said opening to said flange portion soas to pivotally support said door when it is at its closed position,means preventing withdrawal of said arm through at least the lower partof said one side wall opening, so that during opening movement of thedoor from its closed position it will first move pivotally about thepoint of engagement of said arm and flange until the arm engages thelower edge of said side wall opening and thereafter it will movepivotally about that point of engagement.

2. A lighting fixture comprising, a housing having a bottom opening, atleast one side wall of the housing having at the lower edge thereof aflange which extends laterally outwardly thereof, an opening in said oneside wall having its lower edge spaced above and parallel to saidflange, a door having a closed position where it is located within saidbottom housing opening, said door having at its side adjacent said onehousing side wall a hinge member in the form of an elongated arm whichextends laterally outwardly from the door through said one side wallopening from the inner side of said one side wall at a location abovethe lower edge of said wall opening, with its outer end being bentdownwardly into engagement with the upper surface of said flange, saidouter end of said arm being of a length greater than the distance fromthe lower edge of said opening to said flange portion so as to pivotallysupport said door when it is at its closedposition, and said am having awidened outer .end portion of greater width than upper a'ndlowergpor-'tions of said side wall opening but of less width than an enlargedintermediate portion of'said side wall opening so that the arm can beremoved from the side wallopening only when the door is at anintermediate open position and is raised to align the outer end portionof the arm with said enlarged intermediate portion of said side wallopening.

3. A lighting fixture comprising, a housing having a bottom opening, atleast one side wall of the housing having at the lower edge thereof aflange which extends laterally outwardly thereof, an opening in said oneside wall having its lower edge spaced above and parallel to saidflange, a door having a closed position where it is located within saidbottom housing opening, said door having at its side adjacent said onehousing side wall a hinge member in the form of an elongated arm whichextends laterally outwardly from the door through said one side wallopening from the inner side of said one side wall at a location abovethe lower edge of said wall opening, with its outer end being bentdownwardly into engagement with the upper surface of said flange, saidouter end of said arm being of a length greater than the distance fromthe lower edge of said opening to said flange portion so as to pivotallysupport said door when it is at its closed position, means preventingwithdrawal of said arm through at least the lower part of said one sidewall opening, so that during opening movement of the.

door, it will first move pivotally about the point of engagement of saidarm and flange until the arm engages the lower edge of said side wallopening and thereafter it will move pivotally about that point .ofengagement, and during initial closing movement of the door it will movepivotally about the latter point of engagement until the outer end ofsaid arm engages the upper surface of said flange whereupon the doorwill move to its closed position by pivotal movement about the. point ofengagement of the outer end of the arm and the flange which is locatedoutside the housing, to thus effectively lift the door bodily into thehousing opening to its closed position.

4. A hinge mechanism for a receptacle and closure therefor, saidmechanism comprising an arm which extends laterally outwardly from saidclosure with the outer end of said arm being bent at an angle to saidclosure, said outer end of said arm having an outwardly extendingportion of greater width than the remainder of said arm, said receptaclehaving an opening therein and having a flange portion extendingoutwardly therefrom at a position adjacent said opening, said openinghaving an intermediate portion of a slightly larger size than said outerend of said arm and having portions adjacent each side of saidintermediate portion respectively which portions are relatively shorterthan the width of the remainder of said arm, said opening having itslower edge spaced above and parallel to said flange, said outer end ofsaid arm being capable of engaging the upper surface of said flangemember, said outer end of said arm being of a length greater than thedistance from the lower edge of said opening to said flange portion soas to pivotally support said closure when it is in its closed position,said arm being removable from the opening only when the closure is at apartially open position and is moved toward said receptacle to align theouter end portion of the arm with said enlarged intermediate portion ofsaid opening.

5. A hinge mechanism for a receptacle and closure therefor, saidmechanism comprising a receptacle having an outwardly bent flange at oneside, an opening in said receptacle having its lower edge spaced aboveand parallel to said flange, a closure having a closed'position suchthat it lies in a plane substantially parallel to said flange, saidclosure having at its side adjacent said flange a hinge member in theform of an elongated arm which 10 extends laterally outwardly from saidclosure through said receptacle opening at a location above the loweredge of said receptacle opening, with the outer end of said arm beingbent at an angle to said closure'soas to engage the upper' surface ofsaid flange, said outer end of said'arm being of a length greater thanthe distance pivotally about that point of engagement, and duringinitial closing movement of the door said arm will move pivotally aboutthe latter point of engagement until the outer end of said arm engagesthe upper surface of said flange whereupon the door will move to itsclosed position by pivotal movement about the point of engagement of theouter end of the arm and the flange to thus effectively lift the closurebodily into a position substantially parallel to the flange.

'6. A lighting fixture comprising, an elongated housing having a bottomopening, at least one side wall of the housing having at the lower edgethereof a flange which extends laterally outward thereof, an opening insaid one side wall having its lower edge spaced above and parallel tosaid flange, a door of a size to be received in said housing bottomopening at its closed position, means for supporting said door includingat least one hinge member secured to a side frame member and extendinglaterally out of the open side of said one channel frame member, saidhinge member being bent downwardly to engage the upper surface of saidflange, said outer end of said hinge member being of a length greaterthan the distance from the lower edge of said opening to said flangeportion, said door being pivotally mounted about the point of engagementof the hinge member and the upper surface of said flange until the dooris rotated to an intermediate open position thereafter said hinge memberengaging the lower edge of said opening after which the door will movepivotally about this point of engagement, said door upon being closedpivotally rotating about the latter point of engagement until the outerend of the hinge member engages the upper surface of the flange wherebythe door is pivoted about the point of engagement formed by the hingemember and the flange.

7. A lighting fixture comprising, a receptacle having a bottom openingat least one side wall of the receptacle having at the lower edgethereof a flange which extends laterally outwardly thereof, an openingin said one side wall having its lower edge spaced above and parallel tosaid flange, a closure having a closed position within said receptacleopening, said closure having at its side adjacent said side wall a hingemechanism 'in'the form of an elongated arm which extends laterallyoutwardly from the closure through said one side wall opening from theinner side of said one side wall at a location above the lower edge ofsaid wall opening, with its outer end being bent downwardly intoengagement with the uppersun.

face of said flange portion, said outer end of said arm being of alength greater than the distance from the lower edge of said opening tosaid flange portion so as to pivotally support said closure when it isin its closed position, means preventing withdrawal of said arm throughat least the lower part of said one side wall opening, so that duringopening movement of the closure it will move pivotally about the pointof engagement of said arm and flange until the arm engages the loweredge of said side wall opening and thereafter it will move pivotallyabout that point of engagement.

(References on following page) Refgrences Cited in the file of thispatent UNITED STATES PATENTS Pleins June 18, 1912 Ledwinka Mar. 4, 19245 Benson Nov. 24, 1942 12 V Naysmith June 8, 1943 Morand Feb. 5, 1946Runge Apr. 20, 1948 Morand Apr. 18, 1950 Borchers Aug. 28,1951 ZingoneJuly 27, 1954

